25242040 has 32 divisors (see below), whose sum is σ = 59266080. Its totient is φ = 9657472.

The previous prime is 25242037. The next prime is 25242047. The reversal of 25242040 is 4024252.

It is a junction number, because it is equal to n+sod(n) for n = 25241999 and 25242017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25242047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12799 + ... + 14638.

It is an arithmetic number, because the mean of its divisors is an integer number (1852065).

Almost surely, 2^25242040 is an apocalyptic number.

25242040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25242040 is an abundant number, since it is smaller than the sum of its proper divisors (34024040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25242040 is a wasteful number, since it uses less digits than its factorization.

25242040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27471 (or 27467 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 25242040 is about 5024.1456985243. The cubic root of 25242040 is about 293.3423837887.

Adding to 25242040 its reverse (4024252), we get a palindrome (29266292).

The spelling of 25242040 in words is "twenty-five million, two hundred forty-two thousand, forty".